EP2218913A2 - Pump head assembly and pressure washer having such pump head assembly - Google Patents
Pump head assembly and pressure washer having such pump head assembly Download PDFInfo
- Publication number
- EP2218913A2 EP2218913A2 EP10152903A EP10152903A EP2218913A2 EP 2218913 A2 EP2218913 A2 EP 2218913A2 EP 10152903 A EP10152903 A EP 10152903A EP 10152903 A EP10152903 A EP 10152903A EP 2218913 A2 EP2218913 A2 EP 2218913A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- water outlet
- pump head
- head assembly
- fluid inlet
- throttle orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
Definitions
- This invention relates to a pump head assembly for a pressure washer.
- This invention also relates to a pressure washer having a pump head assembly.
- Electric pressure washer has brought great comfort to our life. It is used for cleaning the automobile, cleaning the glass door and window, cleaning the pave of the house and so on. It is high sufficient, safe and convenient for use.
- the electric pressure washer usually comprises a motor, a high pressure pump, a spray gun and a control unit.
- the electric pressure washer in the prior art realize the cleaning compound intake function via the motor power. Water will flow through a throttle orifice which is arranged for automatic intake of the cleaning compound whether the pressure washer sucking the cleaning compound or not. It normally needs 100w power. If the pressure does not need to suck the cleaning compound, it will waste power and thus increase the cost. When there is something wrong with the pressure, it is inconvenient to stop the machine. And when the operator needs spraying cleaning compound or low pressure cleaning, the spray head needs to be changed, thus it is complicated for the operator.
- a pump head assembly for a pressure washer comprising: a fluid inlet; a first water outlet; a pressurizing unit disposed between the first water outlet and the fluid inlet; the pump head assembly comprises a separate second water outlet, and a throttle orifice disposed between the fluid inlet and the second water outlet; and wherein a liquid suction port for cleaning compound flowing through is disposed at an outlet end of the throttle orifice.
- a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
- the throttle orifice is in the shape of a funnel that has a small-mouth and a large-mouth.
- the outlet end of the throttle orifice is the small-mouth of the funnel.
- a liquid intake shifter is disposed between the fluid inlet and the second water outlet, the liquid intake shifter is shiftable between a first position that the fluid inlet and the second water outlet are connected through the throttle orifice, and a second position that the fluid inlet and the second water outlet are connected through a passage independent from the throttle orifice.
- the liquid intake shifter comprises a liquid intake ball valve which is disposed between the fluid inlet and the throttle orifice.
- the passage of the liquid intake shifter is substantially parallel to a passage formed by the throttle orifice.
- a seal ring is equipped with the liquid intake ball valve.
- the water outlet pressure at the second water outlet is substantially the same as the fluid inlet pressure.
- the pressure of the fluid at the first outlet is greater than the pressure of the fluid at the second outlet.
- an overflow valve is disposed between the fluid inlet and the first water outlet such that water will flow back to the fluid inlet when the water outlet pressure is above a predetermined value.
- the first water outlet extends along a first axis
- the second water outlet extends along a second axis
- the first axis is parallel to the second axis.
- the liquid suction port extends along an axis that is perpendicular to the second axis.
- a pressure washer comprising: a pump head assembly; a spray gun having a first inlet and a second inlet; the pump head assembly comprises a fluid inlet; a first water outlet connected with the first inlet of the spray gun; a pressurizing unit disposed between the first water outlet and the fluid inlet; the pump head assembly comprises a separate second water outlet connected with the second inlet of the spray gun, and a throttle orifice disposed between the fluid inlet and the second water outlet; and a liquid suction port for cleaning compound flowing through is disposed at an outlet end of the throttle orifice.
- a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
- the throttle orifice is in the shape of a funnel that has a small-mouth and a large-mouth. More particularly, the outlet end of the throttle orifice is the small-mouth of the funnel.
- a liquid intake shifter is disposed between the fluid inlet and the second water outlet, the liquid intake shifter is shiftable between a first position that the fluid inlet and the second water outlet are connected through the throttle orifice, and a second position that the fluid inlet and the second water outlet are connected through a passage independent from the throttle orifice.
- the liquid intake shifter comprises a liquid intake ball valve which is disposed between the fluid inlet and the throttle orifice.
- the passage of the liquid intake shifter is substantially parallel to a passage formed by the throttle orifice.
- the pump head assembly realizes cleaning liquid suction by self-pressure of tap water, which lowers energy consumption, and effectively and reasonably saves energy sources.
- the pressure washer need less motor power than the ordinary pressure washer in order to output the same quantity of water, thus it reduces the product cost.
- the pressure washer should be operated to realize high pressure washing and low pressure cleaning at the same time by actuating the high pressure washing switch and the low pressure cleaning switch simultaneously.
- the spray gun of the pressure washer is connected with the pump head assembly by soft tube. It makes the spray gun more comfortable for the operator.
- FIG. 1 it shows a pressure washer which has a pump head assembly.
- the pressure washer comprises a motor 1, a pressurizing unit 3, a spray gun 5, a cleaning compound container 7, a pump head assembly 9, a switch 11 for controlling the motor, and a micro-movement switch assembly 13 for preventing the motor from overload.
- the pressure washer is disposed on a frame 32.
- a pair of wheels 33 is disposed on the bottom of the frame 32 in order that the operator can move the pressure washer when he cleaning a window.
- the pump head assembly 9 comprises a pump head 15.
- the pump head 15 has a fluid inlet 17, a first water outlet 19.
- the fluid inlet 17 is connected with tap water.
- the pressurizing unit 3 is disposed between the first water outlet 19 and the fluid inlet 17.
- the pressurizing unit 3 drives the pump head assembly output high pressure water.
- the pressurizing unit 3 in the present embodiment is a rod -piston type pressurizing unit.
- the pump head 15 includes a second water outlet 21.
- a throttle orifice 23 is disposed between the second water outlet 21 and the fluid inlet 17.
- the throttle orifice 23 has an output end 25 and an intake end 27.
- a liquid suction port 29 for cleaning compound flowing through is disposed at the output end 25 of the throttle orifice 23.
- the first water outlet 19 extends along a first axis
- the second water outlet 21 extends along a second axis
- the first axis is parallel to the second axis. More particularly, the liquid suction port 29 extends along an axis that is perpendicular to the second axis.
- a liquid intake shifter 37 is disposed between the fluid inlet 17 and the second water outlet 21.
- the liquid intake shifter 37 is shiftable between a first position that the fluid inlet 17 and the second water outlet 21 are connected through the throttle orifice 23, and a second position that the fluid inlet 17 and the second water outlet 21 are connected through a passage independent from the throttle orifice 23.
- the liquid intake shifter 37 comprises a liquid intake ball valve 35 which is disposed between the fluid inlet 17 and the throttle orifice 23. In this embodiment, the liquid intake ball valve 35 is disposed at the inlet end 27 of the throttle orifice 23.
- the passage of the liquid intake shifter 37 is substantially parallel to a passage formed by the throttle orifice 23.
- the liquid intake ball valve 35 is rotatable about the second water outlet 21 such that the fluid inlet 17 is selectively got connection with the inlet end 27 of the throttle orifice 23 or the outlet end 25 of the throttle orifice 23.
- the throttle orifice 23 is in the shape of a funnel that has a small-mouth and a large-mouth.
- the outlet end 25 of the throttle orifice 23 is the small-mouth of the funnel.
- a seal ring is equipped with the liquid intake ball valve 35.
- the water outlet pressure at the second water outlet 21 is substantially the same as the fluid inlet pressure at the fluid inlet 17.
- the pressure of the fluid at the first water outlet 19 is greater than the pressure of the fluid at the second water outlet 21.
- An overflow valve 39 is disposed between the fluid inlet 17 and the first water outlet 19 such that water will flow back to the fluid inlet 17 when the water outlet pressure of the first water outlet 19 is above a predetermined value.
- the overflow valve 39 is connected with a micro movement switch assembly 13.
- the overflow valve 39 is mounted below the pump head 15.
- One end of the overflow valve 39 is fluid with the first water outlet 19, while the other end of the overflow valve 39 is fluid with the fluid inlet 17.
- the overflow valve 39 comprises a valve core 41 and a spring 43 which is mounted around the valve core 41. The spring 43 is prepressed such that it provides the valve core 41 a predetermined pressure.
- the micro movement switch assembly 13 comprises a lever 45, a micro movement switch button 47 and a micro movement switch 49.
- One end of the lever 45 is contacted with the bottom of the valve core 41, the other end of the lever 45 is contacted with the micro movement switch button 47, such that, the lever 45 and the micro movement switch button 47 and the bottom of the valve core 41 are connected according to a lever theory.
- the motor 1 When the motor 1 is overload, the water pressure of the first water outlet 19 increases larger than the prepress pressure of the spring 43, the spring 43 will push the valve core 41 moving to open the overflow valve. The high pressure water in the first water outlet 19 flows back to the fluid inlet 17 through the overflow valve 39. And at the same time, the valve core 41 presses the lever 45 to rotate the lever 45, and the lever 45 actuate the micro movement switch button 47 to cut off the micro movement switch 49, the motor 1 stops. Thereby, the motor 1 will not be destroyed.
- a liquid suction valve connector 51 is disposed at the liquid suction port 29.
- a one way valve 31 is disposed in the liquid suction port 29 for controlling the cleaning compound intake.
- the liquid suction valve connector 51 is connected with the cleaning compound container 7 via soft tube.
- the first water outlet 19 extends along a first axis.
- the second water outlet 21 extends along a second axis.
- the first axis is parallel to the second axis.
- the liquid suction port 29 extends along an axis that is perpendicular to the second axis.
- a low pressure tube 53 and a high pressure tube 55 are disposed on the spray gun 5.
- a switch ball valve 57 is mounted in the low pressure tube 53.
- a low pressure soft tube 59 is connected with a water inlet end of the low pressure tube 53.
- a low pressure washing head 61 is connected with a water outlet end of the low pressure tube 53.
- the switch ball valve 57 is operable to control the on/off of the low pressure tube 53.
- a high pressure trigger 63 is disposed on the high pressure tube 55.
- a high pressure soft tube 65 is connected with a water inlet end of the high pressure tube 55.
- a high pressure washing head 67 is connected with a water outlet end of the high pressure tube 55.
- the high pressure trigger 63 is operable to control the on/off of the high pressure tube 65.
- the low pressure soft tube 59 and the high pressure soft tube 65 are formed by integral soft tube such that the soft tube is hard to be folded, tap water in the low pressure soft tube 59 will flow smoothly.
- Protective cover 69 are respectively arranged at the end of the low pressure soft tube 59 and the high pressure soft tube 65. Thereby the low pressure soft tube 59 and the high pressure soft tube 65 are hard to be torn. The soft tube will not be folded such that the flow quantity and pressure of the pressure washer will be maintained.
- FIG. 3 shows a sectional view of the pump head assembly being in the status of cleaning compound intake.
- the operator adjusts the liquid intake ball valve 35 that the fluid inlet 17 is fluid with the throttle orifice 23 and disconnected with the liquid intake shifter 37, thus the low pressure tap water could automatically suck the cleaning compound and output water. That means the second water outlet 21 will flow water with cleaning compound.
- FIG. 4 shows a sectional view of a pump head assembly being in the status of low pressure washing.
- the operator adjusts the liquid intake ball valve 35 that the fluid inlet 17 is fluid with the liquid intake shifter 37 and disconnected with the throttle orifice 23.
- the tap water from the fluid inlet 17 will flow out to wash the things to be cleaned.
- FIG. 5 is a sectional view of FIG.4 along line K-K.
- a liquid intake switch button 71 is connected with the liquid intake ball valve 35. The liquid intake switch button 71 is rotated by the operator and rotates the liquid intake ball valve 35, thus the pressure washer smoothly be shifted from a liquid intake status and a low pressure washing status.
- the pressure washer is operated by the following steps.
- the high pressure soft tube 65 is inserted into the end of the high pressure tube 55. Lock the end portion of the high pressure soft tube 65 by a pin.
- the low pressure soft tube 59 is inserted into the end of the low pressure tube 53 and locked.
- the tap water flows from the fluid inlet 17 into the liquid intake ball valve 35 at certain pressure and flow quantity. And then the tap water is sprayed out through the throttle orifice 23. Because of the spray function, the liquid suction port 29 will form vacuum space, the cleaning compound will move against the one way valve 31 and flow into the second water outlet 21 to mix with the tap water. Mixture of the cleaning compound and the tap water will move through the low pressure soft tube 59, the low pressure tube 53 and the switch ball valve 57 and sprayed out from the low pressure washing head 61 to spray cleaning compound to the things to be cleaned.
- the tap water flows through the first water outlet 19, the high pressure soft tube 65, the high pressure tube 55 and spray out from the high pressure washing head 67 to high pressure clean the things to be cleaned.
- the liquid intake ball valve 35 can be adjusted by rotating 90 degrees to be a washing status.
- the tap water flows from the fluid inlet 17 into the liquid intake ball valve 35, then flows through the liquid intake shifter 37, the second water outlet 21, the low pressure soft tube 59, the low pressure tube 53 and the switch ball valve 57, sprays out from the low pressure washing head 61 to clean the things been sprayed.
- the low pressure washing flow quantity of a one tube pressure washer in the prior art is 180-200L/h, while the low pressure washing flow quantity of the present pressure washer which has the same tube diameter is 560-600L/h. It shows that the low pressure washing flow quantity of the present pressure washer is more than three times of that in the prior art.
- the switch ball valve 57 also is opened.
- the pressure washer will clean the dirt which was sprayed by the high pressure water quickly.
- the pressure washer can complete high pressure spray and low pressure clean at one time, the cleaning efficiency is improved.
- a channel can be connected directly between the fluid inlet 17 and the second water outlet 21.
- the low pressure liquid intake device can be directly arranged on the channel to realize liquid intake and low pressure cleaning between the fluid inlet 17 and the second water outlet 21.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to a pump head assembly. The pump head assembly comprises a pump head which at least has a water inlet and a first water outlet between which a pressurizing unit is provided, and the pump head further comprises a second water outlet, a throttle orifice is provided between the water inlet and the second water outlet, the throttle orifice is provided with a water outlet end and a water inlet end, the throttle orifice is provide with a liquid suction port, and a one way valve is provided on the liquid suction port. The pump head assembly realizes cleaning liquid suction by self-pressure of tap water, which lowers energy consumption, and effectively and reasonably saves energy sources.
Description
- This invention relates to a pump head assembly for a pressure washer.
- This invention also relates to a pressure washer having a pump head assembly.
- Electric pressure washer has brought great comfort to our life. It is used for cleaning the automobile, cleaning the glass door and window, cleaning the pave of the house and so on. It is high sufficient, safe and convenient for use. The electric pressure washer usually comprises a motor, a high pressure pump, a spray gun and a control unit. The electric pressure washer in the prior art realize the cleaning compound intake function via the motor power. Water will flow through a throttle orifice which is arranged for automatic intake of the cleaning compound whether the pressure washer sucking the cleaning compound or not. It normally needs 100w power. If the pressure does not need to suck the cleaning compound, it will waste power and thus increase the cost. When there is something wrong with the pressure, it is inconvenient to stop the machine. And when the operator needs spraying cleaning compound or low pressure cleaning, the spray head needs to be changed, thus it is complicated for the operator.
- According to one aspect of the invention, a pump head assembly for a pressure washer, comprising: a fluid inlet; a first water outlet; a pressurizing unit disposed between the first water outlet and the fluid inlet; the pump head assembly comprises a separate second water outlet, and a throttle orifice disposed between the fluid inlet and the second water outlet; and wherein a liquid suction port for cleaning compound flowing through is disposed at an outlet end of the throttle orifice.
- Preferably, a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
- Preferably, the throttle orifice is in the shape of a funnel that has a small-mouth and a large-mouth.
- Preferably, the outlet end of the throttle orifice is the small-mouth of the funnel.
- Preferably, a liquid intake shifter is disposed between the fluid inlet and the second water outlet, the liquid intake shifter is shiftable between a first position that the fluid inlet and the second water outlet are connected through the throttle orifice, and a second position that the fluid inlet and the second water outlet are connected through a passage independent from the throttle orifice.
- Preferably, the liquid intake shifter comprises a liquid intake ball valve which is disposed between the fluid inlet and the throttle orifice.
- Preferably, the passage of the liquid intake shifter is substantially parallel to a passage formed by the throttle orifice.
- Preferably, a seal ring is equipped with the liquid intake ball valve.
- Preferably, the water outlet pressure at the second water outlet is substantially the same as the fluid inlet pressure.
- Preferably, the pressure of the fluid at the first outlet is greater than the pressure of the fluid at the second outlet.
- Preferably, an overflow valve is disposed between the fluid inlet and the first water outlet such that water will flow back to the fluid inlet when the water outlet pressure is above a predetermined value.
- Preferably, the first water outlet extends along a first axis, the second water outlet extends along a second axis, the first axis is parallel to the second axis. More particularly, the liquid suction port extends along an axis that is perpendicular to the second axis.
- According to another aspect of the present invention, a pressure washer comprising: a pump head assembly; a spray gun having a first inlet and a second inlet; the pump head assembly comprises a fluid inlet; a first water outlet connected with the first inlet of the spray gun; a pressurizing unit disposed between the first water outlet and the fluid inlet; the pump head assembly comprises a separate second water outlet connected with the second inlet of the spray gun, and a throttle orifice disposed between the fluid inlet and the second water outlet; and a liquid suction port for cleaning compound flowing through is disposed at an outlet end of the throttle orifice.
- Preferably, a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
- Preferably, the throttle orifice is in the shape of a funnel that has a small-mouth and a large-mouth. More particularly, the outlet end of the throttle orifice is the small-mouth of the funnel.
- Preferably, a liquid intake shifter is disposed between the fluid inlet and the second water outlet, the liquid intake shifter is shiftable between a first position that the fluid inlet and the second water outlet are connected through the throttle orifice, and a second position that the fluid inlet and the second water outlet are connected through a passage independent from the throttle orifice. Preferably, the liquid intake shifter comprises a liquid intake ball valve which is disposed between the fluid inlet and the throttle orifice.
- Preferably, the passage of the liquid intake shifter is substantially parallel to a passage formed by the throttle orifice.
- Compared with the prior art, the pump head assembly realizes cleaning liquid suction by self-pressure of tap water, which lowers energy consumption, and effectively and reasonably saves energy sources.
- During the high pressure washing process, the pressure washer need less motor power than the ordinary pressure washer in order to output the same quantity of water, thus it reduces the product cost.
- The pressure washer should be operated to realize high pressure washing and low pressure cleaning at the same time by actuating the high pressure washing switch and the low pressure cleaning switch simultaneously.
- The spray gun of the pressure washer is connected with the pump head assembly by soft tube. It makes the spray gun more comfortable for the operator.
- The invention will now be described with reference to the drawings in which:
-
FIG. 1 is an illustrative view of a pressure washer according to the invention; -
FIG. 2 is an explosive view of a pressure washer according to the invention; -
FIG. 3 is a sectional view of a pump head assembly, wherein it is in the status of cleaning compound intake; -
FIG. 4 is a sectional view of a pump head assembly, wherein it is in the status of low pressure washing; -
FIG. 5 is a sectional view ofFIG.4 along line K-K. - Referring now to the drawings and the preferred embodiments to illustrate the present invention. These figures are simple illustrative views showing the basic structure of the present invention.
- Referring to
FIG. 1 , it shows a pressure washer which has a pump head assembly. The pressure washer comprises amotor 1, a pressurizing unit 3, a spray gun 5, acleaning compound container 7, apump head assembly 9, aswitch 11 for controlling the motor, and a micro-movement switch assembly 13 for preventing the motor from overload. - The pressure washer is disposed on a frame 32. A pair of wheels 33 is disposed on the bottom of the frame 32 in order that the operator can move the pressure washer when he cleaning a window.
- The
pump head assembly 9 comprises apump head 15. Thepump head 15 has afluid inlet 17, afirst water outlet 19. Thefluid inlet 17 is connected with tap water. - The pressurizing unit 3 is disposed between the
first water outlet 19 and thefluid inlet 17. The pressurizing unit 3 drives the pump head assembly output high pressure water. The pressurizing unit 3 in the present embodiment is a rod -piston type pressurizing unit. - Also referring to
FIG.2 ,FIG. 3 andFIG. 4 , thepump head 15 includes asecond water outlet 21. Athrottle orifice 23 is disposed between thesecond water outlet 21 and thefluid inlet 17. Thethrottle orifice 23 has anoutput end 25 and anintake end 27. Aliquid suction port 29 for cleaning compound flowing through is disposed at theoutput end 25 of thethrottle orifice 23. Thefirst water outlet 19 extends along a first axis, thesecond water outlet 21 extends along a second axis, the first axis is parallel to the second axis. More particularly, theliquid suction port 29 extends along an axis that is perpendicular to the second axis. - A
liquid intake shifter 37 is disposed between thefluid inlet 17 and thesecond water outlet 21. Theliquid intake shifter 37 is shiftable between a first position that thefluid inlet 17 and thesecond water outlet 21 are connected through thethrottle orifice 23, and a second position that thefluid inlet 17 and thesecond water outlet 21 are connected through a passage independent from thethrottle orifice 23. Theliquid intake shifter 37 comprises a liquidintake ball valve 35 which is disposed between thefluid inlet 17 and thethrottle orifice 23. In this embodiment, the liquidintake ball valve 35 is disposed at theinlet end 27 of thethrottle orifice 23. The passage of theliquid intake shifter 37 is substantially parallel to a passage formed by thethrottle orifice 23. The liquidintake ball valve 35 is rotatable about thesecond water outlet 21 such that thefluid inlet 17 is selectively got connection with theinlet end 27 of thethrottle orifice 23 or the outlet end 25 of thethrottle orifice 23. - The
throttle orifice 23 is in the shape of a funnel that has a small-mouth and a large-mouth. Theoutlet end 25 of thethrottle orifice 23 is the small-mouth of the funnel. Thus the cleaning compound will be automatically sucked from theliquid suction port 29 via the pressure of tap water. It realizes cleaning liquid suction by self-pressure of tap water, which lowers energy consumption, and effectively and reasonably saves energy sources. A seal ring is equipped with the liquidintake ball valve 35. - The water outlet pressure at the
second water outlet 21 is substantially the same as the fluid inlet pressure at thefluid inlet 17. - The pressure of the fluid at the
first water outlet 19 is greater than the pressure of the fluid at thesecond water outlet 21. - An
overflow valve 39 is disposed between thefluid inlet 17 and thefirst water outlet 19 such that water will flow back to thefluid inlet 17 when the water outlet pressure of thefirst water outlet 19 is above a predetermined value. Theoverflow valve 39 is connected with a micro movement switch assembly 13. Theoverflow valve 39 is mounted below thepump head 15. One end of theoverflow valve 39 is fluid with thefirst water outlet 19, while the other end of theoverflow valve 39 is fluid with thefluid inlet 17. Theoverflow valve 39 comprises avalve core 41 and aspring 43 which is mounted around thevalve core 41. Thespring 43 is prepressed such that it provides the valve core 41 a predetermined pressure. - The micro movement switch assembly 13 comprises a
lever 45, a micromovement switch button 47 and amicro movement switch 49. One end of thelever 45 is contacted with the bottom of thevalve core 41, the other end of thelever 45 is contacted with the micromovement switch button 47, such that, thelever 45 and the micromovement switch button 47 and the bottom of thevalve core 41 are connected according to a lever theory. When themotor 1 is overload, the water pressure of thefirst water outlet 19 increases larger than the prepress pressure of thespring 43, thespring 43 will push thevalve core 41 moving to open the overflow valve. The high pressure water in thefirst water outlet 19 flows back to thefluid inlet 17 through theoverflow valve 39. And at the same time, thevalve core 41 presses thelever 45 to rotate thelever 45, and thelever 45 actuate the micromovement switch button 47 to cut off themicro movement switch 49, themotor 1 stops. Thereby, themotor 1 will not be destroyed. - A liquid
suction valve connector 51 is disposed at theliquid suction port 29. A oneway valve 31 is disposed in theliquid suction port 29 for controlling the cleaning compound intake. The liquidsuction valve connector 51 is connected with the cleaningcompound container 7 via soft tube. When the liquidintake ball valve 35 is selected to be connected with theinlet end 27 of thethrottle orifice 23, the pressure from the tap water will automatically suck the cleaning compound from the cleaningcompound container 7 into thesecond water outlet 21 in order to realize low pressure liquid intake. - The
first water outlet 19 extends along a first axis.Thesecond water outlet 21 extends along a second axis. The first axis is parallel to the second axis. More particularly, theliquid suction port 29 extends along an axis that is perpendicular to the second axis. - A low pressure tube 53 and a high pressure tube 55 are disposed on the spray gun 5. A switch ball valve 57 is mounted in the low pressure tube 53. A low pressure soft tube 59 is connected with a water inlet end of the low pressure tube 53. A low pressure washing head 61 is connected with a water outlet end of the low pressure tube 53. The switch ball valve 57 is operable to control the on/off of the low pressure tube 53.
- A high pressure trigger 63 is disposed on the high pressure tube 55. A high pressure soft tube 65 is connected with a water inlet end of the high pressure tube 55. A high pressure washing head 67 is connected with a water outlet end of the high pressure tube 55. The high pressure trigger 63 is operable to control the on/off of the high pressure tube 65.
- The low pressure soft tube 59 and the high pressure soft tube 65 are formed by integral soft tube such that the soft tube is hard to be folded, tap water in the low pressure soft tube 59 will flow smoothly. Protective cover 69 are respectively arranged at the end of the low pressure soft tube 59 and the high pressure soft tube 65. Thereby the low pressure soft tube 59 and the high pressure soft tube 65 are hard to be torn. The soft tube will not be folded such that the flow quantity and pressure of the pressure washer will be maintained.
-
FIG. 3 shows a sectional view of the pump head assembly being in the status of cleaning compound intake. The operator adjusts the liquidintake ball valve 35 that thefluid inlet 17 is fluid with thethrottle orifice 23 and disconnected with theliquid intake shifter 37, thus the low pressure tap water could automatically suck the cleaning compound and output water. That means thesecond water outlet 21 will flow water with cleaning compound. -
FIG. 4 shows a sectional view of a pump head assembly being in the status of low pressure washing. The operator adjusts the liquidintake ball valve 35 that thefluid inlet 17 is fluid with theliquid intake shifter 37 and disconnected with thethrottle orifice 23. The tap water from thefluid inlet 17 will flow out to wash the things to be cleaned. -
FIG. 5 is a sectional view ofFIG.4 along line K-K. A liquidintake switch button 71 is connected with the liquidintake ball valve 35. The liquidintake switch button 71 is rotated by the operator and rotates the liquidintake ball valve 35, thus the pressure washer smoothly be shifted from a liquid intake status and a low pressure washing status. - The pressure washer is operated by the following steps.
- Firstly, the high pressure soft tube 65 is inserted into the end of the high pressure tube 55. Lock the end portion of the high pressure soft tube 65 by a pin. The low pressure soft tube 59 is inserted into the end of the low pressure tube 53 and locked.
- Put the cleaning compound into the cleaning
compound container 7. Connect the tap water tube with thefluid inlet 17. - Connect the power cord to the power source.
- Adjust the liquid
intake ball valve 35 to the liquid intake status. Open the low pressure switch ball valve 57. The tap water flows from thefluid inlet 17 into the liquidintake ball valve 35 at certain pressure and flow quantity. And then the tap water is sprayed out through thethrottle orifice 23. Because of the spray function, theliquid suction port 29 will form vacuum space, the cleaning compound will move against the oneway valve 31 and flow into thesecond water outlet 21 to mix with the tap water. Mixture of the cleaning compound and the tap water will move through the low pressure soft tube 59, the low pressure tube 53 and the switch ball valve 57 and sprayed out from the low pressure washing head 61 to spray cleaning compound to the things to be cleaned. - And then turn on the high pressure trigger 63 of the spray gun 5 and press the power switch to actuate the pressurizing unit 3 such that the high pressure tube 55 will spray high pressure water. The tap water flows through the
first water outlet 19, the high pressure soft tube 65, the high pressure tube 55 and spray out from the high pressure washing head 67 to high pressure clean the things to be cleaned. - Compared with the prior art, when the pressure washer is operated in the high pressure washing status, because there is no throttle orifice in the
first water outlet 19 and part of resistance is reduced, the same quantity of water will cost less energy. Power of themotor 1 will be cost less, product cost is reduced and the energy is saved. - At the same time, the liquid
intake ball valve 35 can be adjusted by rotating 90 degrees to be a washing status. The tap water flows from thefluid inlet 17 into the liquidintake ball valve 35, then flows through theliquid intake shifter 37, thesecond water outlet 21, the low pressure soft tube 59, the low pressure tube 53 and the switch ball valve 57, sprays out from the low pressure washing head 61 to clean the things been sprayed. - According to some test, the low pressure washing flow quantity of a one tube pressure washer in the prior art is 180-200L/h, while the low pressure washing flow quantity of the present pressure washer which has the same tube diameter is 560-600L/h. It shows that the low pressure washing flow quantity of the present pressure washer is more than three times of that in the prior art.
- Of course, when the high pressure trigger 63 is opened, the switch ball valve 57 also is opened. The pressure washer will clean the dirt which was sprayed by the high pressure water quickly. Thus the pressure washer can complete high pressure spray and low pressure clean at one time, the cleaning efficiency is improved.
- In the present invention, a channel can be connected directly between the
fluid inlet 17 and thesecond water outlet 21. The low pressure liquid intake device can be directly arranged on the channel to realize liquid intake and low pressure cleaning between thefluid inlet 17 and thesecond water outlet 21. - Having described the preferred embodiment, it will become apparent that various modifications can be made without departing from the scope of the invention as defined in the accompanying claims
-
- 1. motor
- 3. pressurizing unit
- 5. spray gun
- 7. cleaning compound container
- 9. pump head assembly
- 11. switch
- 13. micro movement switch assembly
- 15. pump head
- 17. fluid inlet
- 19. first water outlet
- 21. second water outlet
- 23. throttle orifice
- 25. output end
- 27. intake end
- 29. liquid suction port
- 31. one way valve
- 32. frame
- 33. wheel
- 35. liquid intake ball valve
- 37. liquid intake shifter
- 39. overflow valve assembly
- 41. valve core
- 43. spring
- 45. lever
- 47. micro movement switch button
- 49. micro movement switch
- 51. liquid suction valve connector
- 53. low pressure tube
- 55. high pressure tube
- 57. switch ball valve
- 59. low pressure soft tube
- 61. low pressure washing head
- 63. high pressure trigger
- 65. high pressure soft tube
- 67. high pressure washing head
- 69. protective cover
- 71. liquid intake button
Claims (15)
- A pump head assembly for a pressure washer, comprising:a fluid inlet;a first water outlet;a pressurizing unit disposed between the first water outlet and the fluid inlet;characterized by comprising a separate second water outlet, and a throttle orifice disposed between the fluid inlet and the second water outlet, and a liquid suction port for cleaning compound flowing through disposed at an outlet end of the throttle orifice.
- The pump head assembly according to claim 1, wherein a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
- The pump head assembly according to claim 1 or 2, wherein the throttle orifice is in the shape of a funnel that has a small-mouth and a large-mouth.
- The pump head assembly according to claim 3, wherein the outlet end of the throttle orifice is the small-mouth of the funnel.
- The pump head assembly according to claim 1, wherein a liquid intake shifter is disposed between the fluid inlet and the second water outlet, the liquid intake shifter is shiftable between a first position that the fluid inlet and the second water outlet are connected through the throttle orifice, and a second position that the fluid inlet and the second water outlet are connected through a passage independent from the throttle orifice.
- The pump head assembly according to claim 5, wherein the liquid intake shifter comprises a liquid intake ball valve which is disposed between the fluid inlet and the throttle orifice.
- The pump head assembly according to claim 5, wherein the passage of the liquid intake shifter is substantially parallel to a passage formed by the throttle orifice.
- The pump head assembly according to claim 6, wherein a seal ring is equipped with the liquid intake ball valve.
- The pump head assembly according to any of the preceding claims, wherein the water outlet pressure at the second water outlet is substantially the same as the fluid inlet pressure.
- The pump head assembly according to any of the preceding claims, wherein the pressure of the fluid at the first outlet is greater than the pressure of the fluid at the second outlet.
- The pump head assembly according to any of the preceding claims, wherein an overflow valve is disposed between the fluid inlet and the first water outlet such that water will flow back to the fluid inlet when the water outlet pressure is above a predetermined value.
- The pump head assembly according to any of the preceding claims, wherein the first water outlet extends along a first axis, the second water outlet extends along a second axis, the first axis is parallel to the second axis.
- The pump head assembly according to claim 12, wherein the liquid suction port extends along an axis that is perpendicular to the second axis.
- A pressure washer comprising:a pump head assembly;a spray gun having a first inlet and a second inlet ;the pump head assembly comprises:wherein the pump head assembly comprises a separate second water outlet connected with the second inlet of the spray gun, and a throttle orifice disposed between the fluid inlet and the second water outlet; anda fluid inlet;a first water outlet connected with the first inlet of the spray gun;a pressurizing unit disposed between the first water outlet and the fluid inlet;
wherein a liquid suction port for cleaning compound flowing through is disposed at an outlet end of the throttle orifice. - The pressure washer of claim 14, wherein a one way valve is disposed in the liquid suction port for controlling the cleaning compound intake.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009100248006A CN101487479B (en) | 2009-02-16 | 2009-02-16 | Pump head component and cleaning machine with the same |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2218913A2 true EP2218913A2 (en) | 2010-08-18 |
Family
ID=40890504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10152903A Withdrawn EP2218913A2 (en) | 2009-02-16 | 2010-02-08 | Pump head assembly and pressure washer having such pump head assembly |
Country Status (3)
Country | Link |
---|---|
US (1) | US8632021B2 (en) |
EP (1) | EP2218913A2 (en) |
CN (1) | CN101487479B (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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USD749805S1 (en) * | 2013-10-08 | 2016-02-16 | Briggs & Stratton Corporation | Pressure washer |
CN103691595A (en) * | 2013-12-19 | 2014-04-02 | 常州格力博有限公司 | DC (direct current) sprayer |
USD732764S1 (en) * | 2014-03-10 | 2015-06-23 | Theodosier Pty Ltd | Pressure washer |
CN103835910B (en) * | 2014-03-24 | 2016-07-06 | 上海永灼机电有限公司 | A kind of energy-saving big-flow high-pressure water pump for jetting machine and method |
CN104607409A (en) * | 2015-02-12 | 2015-05-13 | 国家电网公司 | Extensible spray gun based cleaner special for dry air-cored reactors |
USD778011S1 (en) * | 2015-03-16 | 2017-01-31 | Fna Group, Inc. | Pressure washer |
CN104815815B (en) * | 2015-04-30 | 2017-05-17 | 苏州黑猫(集团)有限公司 | Pressure lifting type water outgoing device for washer |
USD833696S1 (en) * | 2016-06-20 | 2018-11-13 | Kärcher North America, Inc. | Pressure washer |
USD836272S1 (en) * | 2016-07-22 | 2018-12-18 | Briggs & Stratton Corporation | Pressure washer frame |
USD841906S1 (en) * | 2017-04-13 | 2019-02-26 | Andreas Stihl Ag & Co. Kg | High-pressure cleaner |
CN107520078B (en) * | 2017-10-04 | 2023-02-24 | 杭州迅秀丽智能科技有限公司 | Shower head for washing hair |
USD838926S1 (en) * | 2017-11-28 | 2019-01-22 | Ricardo Delgado | Pressure washer |
USD879394S1 (en) * | 2018-06-28 | 2020-03-24 | Josef Kränzle GmbH & Co. KG | High-pressure cleaner |
US11406995B2 (en) | 2019-01-25 | 2022-08-09 | Graco Minnesota Inc. | Material spray gun |
CN112170320A (en) * | 2019-06-13 | 2021-01-05 | 易锐科智能清洁科技(苏州)有限公司 | High-pressure cleaning machine with wireless electric control pressure pump |
CN110899200A (en) * | 2019-12-01 | 2020-03-24 | 江苏悦达专用车有限公司 | Climbing cleaning operation vehicle |
CN117404270B (en) * | 2023-10-26 | 2024-05-14 | 浙江荣鹏气动工具股份有限公司 | Portable electronic control pressure regulating and pressure releasing structure on spraying machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4341350A (en) * | 1980-09-05 | 1982-07-27 | Otto Wemmer | Chemical injection system for high pressure washers |
DE3115698C1 (en) * | 1981-04-18 | 1982-12-16 | Alfred Kärcher GmbH & Co, 7057 Winnenden | Motor pump unit for a high pressure cleaning device |
US5960887A (en) * | 1996-12-16 | 1999-10-05 | Williams Fire & Hazard Control, Inc. | By-pass eductor |
US7178740B2 (en) * | 2004-01-29 | 2007-02-20 | Williams David K | Pressure washer system and method of operating same |
US7854398B2 (en) * | 2005-10-26 | 2010-12-21 | Techtronic Outdoor Products Technology Limited | Hand held pressure washer |
-
2009
- 2009-02-16 CN CN2009100248006A patent/CN101487479B/en active Active
-
2010
- 2010-02-08 EP EP10152903A patent/EP2218913A2/en not_active Withdrawn
- 2010-02-09 US US12/702,328 patent/US8632021B2/en active Active
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
US8632021B2 (en) | 2014-01-21 |
US20100206964A1 (en) | 2010-08-19 |
CN101487479A (en) | 2009-07-22 |
CN101487479B (en) | 2011-10-05 |
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